Saw-filing machine.



PATENTED MAR. 5 J. M. BEAVER. SAW FILING MACHINE. APPLICATION FILED APR.13. 1906.

5 SHEETS-SHEET l.

. gg WITNESSES: Jb/ @[E [NI/ENTOA.

A TTORNE Y5 PATENTED MAR. 5, 1907.

J. M. BEAVER. SAW FILING MACHINE. APPLICATION FILED APR.18, 1908.

5 SHEETS-SHEET 2.

wa Mm W [TNESSES- fifi /ZMfiZQWf INVENTOR v r A TTORNE Y5 J. M. BEAVER.SAW FILING MACHINE.

APPLICATION FILED APR. 18. 1906.

PATENTED MAR 5, 1907.

5 SHEETS-SHEET 3.

' A TTOR/VE Y5 PATENTED MAR. 5, 1907. J. M. BEAVER.

SAW FILING MACHINE.

APPLICATION FILED APR. 18, 1906.

a sums-sum 4.

By I '0 A TTORNE Y5 PATENTED MAR. 5,1907.

- J. M. BEAVER. SAW FILING MACHINE.

APPLIGATION FILED APR. 18. 1906.

5 SHEETS-SHEET 5.

Kw P 71 U B P 1 WITNESSES.-

A TTORNEYS mter saws.

' for moving U I ED *STATES PATENT OFFICE.

JOHN M. BEAVER, OF

FORT WORTH, TEXAS."

,SAW-FILING MACHINE.

Specification of Letters Patent.

Patented March 5,1907.

Application filed April is, 19os. Serial No. 312.4

Worth, in the county of Tarrant and State of Texas, have invented a newand useful Saw- Filin Machine, of which the following is aspecification.

' I This invention relates to saw-filing "machines, and has for itsprinci'palobject to rovide: amachine for sharpeninggin and vA furtherobject of the invention is to provide a mechanism that is entirelyautomatic inits nature and which when once started will automaticallymove from saw to saw, sharpening all of the .teeth of one saw, and it.into, engagement with and sha ening all of the teeth of the next sawunti {the operation is complete. i

. ent

and

A further object of the invention is to provide a device of this.character in which provision is made for preventing accidentaldisplacement of thepartsor damageto'the files Q, A'still furtherob ectof thefinvention is to provide'an" automatic stop mechanism of suchconstruction as topermitithe operation any. desired point without theconstant'presence of anattendant.

A still-further object of the invention is to provide a'machine whichmay beacc'ur'ately adjusted to suit'saws having teeth of diflerpitch andin which the saws are arranged at different distancesfrom each other. I

A still further movement ofv the'saw for the-presentation of fresh teethto the files. may be made through positive mechanism. operatingatpredeterminedintervals or through means controlled "after an describecompa'nying' j drawings,-

by the; resistance offered to the file's during the sharpening of theteeth.

Withthese and therobjects in view, as .will more fully hereinafter apear, the invention consists incertain nove features of constructionanda'rran ement of partshereim {illustrated in the ac-.

tinder-stood that'various changesin the form, proportions, size, andminor details of the structure 'niay be made without departing from thespirit or sacrificing any of the ad- 'vantages ofthe invention.

saws during the, shifting from one posi-' tion to the other.

. object of the invention is to provide a machine of thistype in whichthe and particularly,

In the accompanying drawings, Figure 1 'is. a front elevation of asaw-filing machine tion. Fig. 2 a plan-view of the same. Fig. '3 1s anend elevation of the machine looking from-the left of Figs. 1 and 2.Figs. 4, 5,

mechanism, showing more especially the difierent'positmns of the maincams. Fig. 7 1s a: detail sectional view, on an enlarged elevation;partly in section, illustrating, the connections at the actuating endof-the main 5. ortion of the frame, illustrating a modified orm offeeding. mechanism. Fig. 10 is a locking! the releasing-shaft.

Sinai ar numerals of reference are employed to indicatecorrespondingparts throughout theseveral figures of the drawings.

The Working-parts of the machine are sup: ported on a suitable frame10,,which may be formed. of wood or metal, and pivoted to the lowerrear'side of the main frame is a swinging frame 11, in which the sawsare support ed the connections being made adjustable toferent'diameters,

Near the lower front portion of the frame are bearings forahorizontally-disposed shaft 15,'which'carries two belt-wheels 16 and17, arranged to receive motion from a line-shaft '18 through apulley19and belt 20. The belt is kept running continuously, and during oneportion of the operation-that is, during the sharpening of-the saws-saidbelt is running over the pulley 17, and during the shifting of themachine for the purpose of adjusting the filing mechanism oppositeanother saw the belt is running over the pulley 16, and this latterpulley may at times be arranged to run loose on the: shaft withouttransmitting movement to any part of the mechanism. The shaft 15 furthercarries a sprocket-wheel 22, having a key or feather fitting in alongitudinal groove 23 in the shaft,lso that the sprocket-wheel mayslide longitudinally of the shaft and receive motion therefrom at anypoint. Y

The upper part of the frame-that is to and 6 are detail views ofaportion of the feed-bar, the view being on the line 8 8 of Fig. 9"isacross-sectional view of a constructed in accordance with the iIlVBIEscale, on the line-7 7 of Fig. 2. Fig. 8 is an detail perspective viewof the mechanism for permit the use of the machine on saws of (lif med 1latterbeing mounted on the shalt 27 Projecting-from the upper face ofarecip filing mechanism, and on: this, carriage" are bearings for thesupport of a shaft 27, having a sprocket-wheel 28, that is connected to}the sprocket-wheel 22 by a link belt 29'. 'EX- tending downwardfr'omithe carriage is a light frame 30', which is providedat itslowerend with a strap fitting within-a groove in the hub 31of-sprocket-wheel 22, this being for the purpose of insiining movementof; the sprocket wheel lengthwise of the shift asthe c'arriage moves inthe same direction.'-'

N ear-the rear end of the carriage is pivoted aplatfo'rm 33, the freeedge of which projects somewhat beyond the rear edge of the main frame,and the free end of the platform is profvided'at one side with a lug 34,against which bears a spring 35; tending to hold the platform down. Thespring. is supported by ayoke-s haped frame 36, parrying a bar or pin37,. oil-which: the spring is disposed, said bar or pin "passing alsothrough an opening in the lug-34. -'.Theve'rtical'wall of the-yoke 36is: provided with a vertically-elongated slot 38,,gthrough which passesa' bolt 39 that screws-into agthraded opening in a bracket .40,the.construction being such as to permlt adjustmentioi the stress' ofthe spring in accordance with the area of vthe:saw-surface tobefgfiledgfor. a 'purpose more fully 's'et'forth,

hereinafter.

The platform 33 is provided with apair of r grooved guide b'ars '41 forth'e reception of a reciprocatoryfile-carriage 42, the front end ofwhich is connected. by a rod 43 to a wriste in- 44, that projectsfromone side of a comli' 'balanceswheel and crank-disk 45,- the .r'ocat-orycarriage 42i-s' an approximately ver- 4otical pin, orstud '46, on'whichis mounted a block elgthat is free for limited play withjthepin- 46"as a center of movement, the movement. being restrained,' however, by aflat spring f 49,, having one .end secured to the block 47. and itsopposite end secured within a slotted'lug 50, projecting from thecarriage 42; -i Theblock 47-carries two'file-sup'porting 'arms'55 and-56, at-the outerends of which areinturned lugs having openings forthein'sen. tion of the ends of the .files, and each arm "carries a clip57,1 by Whichthttangs of thev file'areengaged and held; Thetwo arms are"arranged in diiferenthorizontal planes so that they may engage'withdifferent .teeth of the saw'.,as, for instance, the fil'e of thelowermostarm '55 I will. engage the. first tooth and.

the file of theupper'most arm will engage the third-tooth, and then ion]the next operation the. secondandfourth teeth will be engaged.

The. files cross each other in order to be pre-,

I sented at the proper angle t6 the saw, "andvthe uppermost arm.5 6rests on; aninclined be adjusted laterally of block which may the blockHand-locked inposition by-a setscrew-61. The function of the block 60 isto permit adjustment of the distances between the two-files in order toaccommodate saws having teeth of different pitch. I

The lower arm 55 is preferably formed of a flat strip of springsteel orother metal secured to the right-hand side' of the block, while the arm56, which mayalso be formed ofa' strip of steel, is given a,qhatfter-turn at a point midway of its length,and the horizontal end.is turned down and rests on the rear end of the block 47, a pivot pin 63being ar-: ranged to extend through aid arm.

.. The files are'held down 0 the work by the spring 35, which .may beadjusted as before I 80.

described; in order-to accommodate saws of different type and for thepurpose of conipen-1 sating for the condition of the files. This portionof the mechanism may be arranged to operate for the purpose'of turningthe saw automatically after each tooth is sharpened, this beingaccomplished by'providing some means to resist the turning of the sawuntil the files cutaway sufficient material to develop flat surfaces oflarge area which will ofl'er suc'h resistance to the further movement othe file'thereover that during the second third. orsome succeedingstroke the saw-Will oe/automatically'turnectin order. to bring a :freshtooth into position. This portion of the mechanism, however, while ofvalue in securing uniformity of sharpening, is not mall cases essential,and provisionhas been made in the present machine for positively turninghave beensharpened.

The.'swinging. frame llcarries a saw-suj yv porting mandrel 70, and,secured tosaid mandrel is a disk or wheel '71, having teeth of a numberequal to. the number of teeth in the saw. This toothed wheel is engaged.by a feeding pawl 72, that'is slidably mounted in a bracket-arm. 74,projecting from the bar 24 of the frame. .I This bracket 7.4 hasbearings for the reception of the reduced end portions \-of' .a shortrock-shaft. 76,- from which-pro- ,ject s a rocker-arm 77, the latterpassing the saws step by step until all of the teeth 3 through anopening at the inner end of the 7 Zpawl 72,- and-a'spring '78,surrounding, this r0cker-arm, 'bears'against the bottom of the pawl andtends to hold its operating end in engagement with the teeth. of "thedisk71l Projecting from the rock-shaft is a'second rocker arm'SO, towhich is connected one end of a can1-actuatedrod-82, and this ar-m alsohas a small spring 83, which serves to maintain the; upper end of therod 82 in elevated position. I p Keyed to the main shaft 15 are twocamdisks 85 and. 86, the disk 85 carrying a single cam member. Thedisk86 is provided with two cams. The lower end of the rod 82 is bifurcatedand is adapted to rideingroovesformed between and on the outer sides ofthe cam-.

disks, this bifurcated endof the rod carries an antifrlction-roller 88,which maybe moved there Will be no danger of injury into engagement witheither the disk 85 or the disk 86, so that for each complete rotation ofthe shaft 1 5 movement may beimparted to the toothed'disk 71 for thepurpose of rotating the saw-mandrel and presenting a fresh tooth toposition to be sharpened, or by moving'the roller into engagement withthe disk 86- two saw-adjusting operations may take place for eachrotation of the shaft 15, or the disks may be provided with differentcams for the purpose of increasing the number of movementsfiif desired.This mechanism serves to impart a step-by-step rotative movement to thesaw, and after each movement'the files will be engaged with a freshtooth or teeth, and the operation continues until the saw has made onecomplete revolution .or more than one coinpleterevolution, and all ofthe teeth have been sharpened.

In. order to shift the filing mechanism lengthwise of the frame for thepurpose of sharpening the successive saws, provision is made for movingthe swingingframe 11 outward until the saw-carrying frame completeslongitudinal movement and then for moving the swinging frame inward andpresenting the saw to the action of the files,

to the saw, the files, or other portions of the machine during thisadjustment.

Projectin from the inner face of the upper front bar 0 the machine arebrackets 90, having bearings for 'antifriction-rollers 91, on which aremounted two longitudinallymovable bars 92 and 93, and these bars areprovided with perforations 94 and 95, respectively, the. perforationsbeing spaced from each other at distances corresponding approximately tothe distance between the several saws to'be sharpened. The bar 92,

which constitutes the'carriage-feeding bar, receives movement in thedirection of its length; but such movement is limited in one directionby an inwardly-projecting arm 96 at the left-hand end of the bar 24 andat the opposite end by a bracket 97, that projects V inward from theinnerfaceof said'bar 24.-

- cular form in cross-section.

g The bracket 97 together with a second bracket 98 near the left-handside of the; frame, supports a rock-s aft 99 of non-cir- The rock-shaft99 carries a slidable collar 100, the opposite ends of which fit betweencare 101, projetting froma bracket 102, thatdependS from the slidablecarriage, so that the "carriage and collar must move together in adirection lengthwise ofthe frame; but the collar and shaft "may rockindependentlyof the carriageand its bracket. Extending from the collar100 is an arm 1'03,'th'at projects over the two bars 92 and 93 and .isprovided with an opening in alinementwith the row of openings in the bar92. Through these openings extends a locking-pin 104,

so that I pulley A spring for .the vertical rcclesltaft 119. --clutchingthe upper end of which is guided in an opening formed in a bracket 105,extending from the carriage, and around said pin is arranged a helicalcompression-spring 106, that tends to force the pin through the openingin the bracket and one of the openings or perforations of said. bar 92.

During the shifting of the carriage from saw to saw, as will hereinafterappear, the rock-shaft 99 is turned for the purpose of raising the arm103, and the outer portion of this arm engages a collar or flange 107,carried by the pin 104, drawing the pin upward from the opening of thebar 92, after which said bar is moved toward the right of the machinefor a distance sufficient to present another opening under the pin 104,after which the rock-shaft turns in the opposite direction, allowingthelocking-pin to enter the new opening. The bar 92 then moves toward theleft of the machine, and the carriage is moved to the next position foroper; ation on another saw.

The frame of the machine is provided with bearings for the reception ofa short shaft 1 10, on which is mounted the gear-wheel 1 1 1,

that is in mesh with a pinion 112011 the main shaft 15, and said pinionhasone or more pins 113'projecting from its side, these being arrangedto enter recesses in thebelt-pulley 16 for the purpose of locking thepinion to the 114, extendingbetween the left-hand bearing of the shaft15 and the hub of the pinion 112, tends to keep the pinion clutched tothe pulley; but the pinion may be disconnected when desired by pullingout-- ward on the clutch-operating lever 116, that is pivoted on'ab'racket-115 at the left-hand end of the machine. The lever is providedwith an opening for the passage of a rockerarm 118, that projects fromavertically-disposed rock-shaft 1 19, having bearings carried by theframe, andysaid shaft carries a second rocker-am 120, that engages theupper arm of a lever 122, pivoted at a'point intermediate of its ends toa bracket 123, projecting from the end of the frame. The lower end ofthe lever 122 carries an arm 124 extending inward] Y parallel with theshaft 15 and having a bi ircated end that enters a groove 125, formed inthe hub of the pinion. When the clutch-operating lever is pulledoutward, the pinion will be released from the belt-pulley, and ifthedriving-belt is engaging said pulley the latter will rotate idly withouttransitting movement to any portion of the machine. The parts may belooked in this unclutched position by forcing the lever sidewise into alocking-notch 126, formed in a small bracket 127, projecting from theframe, saidhracket also affording an upper hearing The unof the pinionfrom the bcltpulley may also be accomplished automatically by insertinga pin or other stop a: in one of the IIO , arm-118, so that whenever vti'iwarkl thefleftz-the mechanism-Twill; be auto vinatieally stopped.ning of the. machine antoinatieally up'to any openings o'fthe Ila r 93;and when the arm 193' tit-sleeve 100 engage s against this pin'tlie bar93 "l'lhimhnot'd toward the left of the'i' ia oliii egaiid' saidjljar'93llflSflIIOPBIllllg near its "extreme en d for the passage ofthjefrockerthe bar isinoverl This permits the rundesired point withoutthe constantpresence of 'attendant,- it "being 1 n'erely: neoessary forthe-latter to insert the pinw or someotlier projecting member into anyopening of the.

worke up'tfo that-point the inaehine'will be 3' i .inn'er'ends'of arms-137'. The arms 1 37 are") that islto outward during the first portion ofthe shift- The large? gear-1 l1 1 carries oanis -:132 f;133j

and 134,3'all of which project {from the left face of the. gear-wheel,sand fronithese cams inotion' is --i mpar t ed-- to the various--mechanisms which control the adjustment of the filing-frame in thedirection of thefllength of'the machine;

I The swinging saW-fran1ef 11f, which is the fi'rst member to beadjusted when, thefiling- .frame is-to bfe shifte i, is operatedfromarock bearings at the rear of the frame and provided with tworocker? arms -1 36,vthesearfi s having ins at their ex} neme ends,anclto theipinsfare pivotejfl'tlie each bent tozform two portions atsin-obtuse angleto-eaeh' other'; and. the outer portion" is vprovidedwith an; elongated slot 138 for the "be rigiilyfllocked to the swing ngframe, this donnectionfpermit-ting passage-of a'bolt 139', by whichthearm may 'niaybe'neeess'aryto permit the machine to operate ons 'aws'of d fferent diameter. When tli'e'SWlnglngframe is-in working'pOS1t10Ii' .arm 137-and tlterock'er-armis in 'a'plai'ie below the-axis'of the rocleshaft, as shown in. Fig. 3, so that a positive lock isformed, and:

the swinging. frame is held. rigidly in workinq position.

'inqireme'nt of thefraine, a pair of-springs llfl s arranged between.the rear port on'of the 5? mainframe and the -siwi-n'gin g' fran'ie',{the springs tending to throw said swinging frame ing operation.

v LEI-re? rock-shaft l.

rockeif-arm 142,1 thatis-" connecte'd to the:

" 01.1fm" end Of-ii'bar 148,'the latter being mount ed between ja .pairof antifrictionrollers '1'44," a suitable standard-145,

tli a tz are carried by. Y extendingjupward from the base of themac'h'ine: i The' bar 143 rollers 146 and l 4 7, whichare's'u'cces'sivelyi eiigaged by the earn 132-,

the roller I46 being jenga edlfirstf, so that-the si'ving'in'g frame 11I will "hey-forced outward. from the j-position rollers 1 52, that'areisup orted b of snfch azijustinent as with the sa'ws acting on the.

-filefs "the point of connection bet'ween the 1' In orderfto assist theout far;

5 its-provided, with athi'r'd:

thew-n. in Fi .3 toYthat Shawna Fig- 4, '-the antifriotion 'an'inelinedcross-bar 155,-..dis'pose gne'ar t e left hand ',en'cl'o'fthernainframe. 1 Theupper'endof the bar1 51 engages'a rockenarm 156",that ro'.;-' jectsfroin a horizontally-,disposed rocks aft. I=5Z,"t'hatis mounted i-n'suitable bearingson 151, guided. between a pairofticalrocker-arm 158, the upper end'of Whioh extends-through an.elongatedislot 159; that i'sformedri1ear theleft-hand endof the car-'surrounded yv afeoi'led compression-spring inelevated position;although the spring endlofjthe roekerea'rm ]58 provided wit anapproximately horizontal arm- 161, that pro- 16,0, whiohi'sheld'against'the mg. 161, proijecting from an adjustable collar 162ion the shown InFig'; 10. I That surfaceof the arm clin'ed in thesarnedirection as the car'n and 'when it no'ves under said earn therock-shaft w th one of t e perforations of the ai t--92. The arm isarranged to pass completely underzthecani and beyond the inner andlowermost endthereof, andthen jon-reverse moveinent to rid'efover thetop; of' the cam'fand s p'ri,ng 163"y'ielding tovperI'nit thisoperation.

v.U= shape form or otherwise oozistiucted to ,fornr a guide for-anadjustable block 165, wli'ioh niay" moves, and' the position of thisblock will'de has two antifriction} parte'd'to the carriage. Vthis-portion of the mechanism it will be seen that the earn 134;depresses the roller 1,50,

rock-shaft 157 will beturned, and the m ve;

ward-the end of t iinovernent what, is to justedv%-the ca"m '13-2-wil1'engage with the that-is carried by ayertically-disposed*bar' thevertioal'end-standards of the frame,- as. fs'hoWn nore clearly in Fig5.-v Near the rear" end of the shaft 157'is an approximately 'verf' wae-movi bar .92.; This rookerarn igis .160, that tends ,to maintainthe-bar'92- in all cases will not-be necessary; "I-heu per" eetsoverthebar93 and engages'the ica rn. 1'62,; t-ha t projects from' the roel'gshaftP99..-

.shafit,v means' of a coil-ed'spring 163 .'as- 161 which engages'iinder-the earn-162 is in-'.

99 will be turned in one direction for: thepurpose of moving the pin 104from engagement-' The left-hand end of thehar; 92 is bent into "e no'vedbya set-screw 166 for the purpose of vadjusting fthe'efl'ective lengthof thes'lot 159, in whichthe rocker ar ri 158 termine the extentof-'-fee 'ding movement im- 5 I Inthe operation :01;

I 00 section; and thecarn is'proyidedwi'th a collar me'ht transniitt-edto the rocker-arm 158 will be to the right. The upper end of therockerarm will first travel freely in the slot 159 duringlthe timethear|n,'161 is acting on the cam "16 2 fOI the purpose .of rocking shaft99 and ra slng tholocking-pin 104 from the bar 92;

but-latter this movement is completed the rocker-arm 158 will engage"against the end. wall ofthe slot 159. and will move the bar 92" to theright in order to present a second open ing'or perforation of such barin position un the gear-wheefis further turned thisouter cam 133 willact on the roller 150, raising'the 2c. latter and turning the rock-shaft157 in the der the pin 104, and the latter may then movedown-undertheinfluence of its springj 106'and entersaid opening.-

-()n referring to big. 5

under the influence of the-cam 133, and as opposite direcgt-it'in, sotliatrooker arm 158. will nowbe moved to thedeft. During this Ioperatet'hrough the .latte'r'to transmit movemovement thea'rin 16-1 wilttravel over the cam-162.- The rocker-arm 1 58-will th'e'n'en; gage.ivi'th the adjustable block 165 andwill ment to the b ar'92.- thedistance to .which the 3 amsn in accordance iviththe; distance b e'-''latteris moved being 'deendent on the p051:

Itionof. said blockQandt ii's' permits-accurate ad ust-mentof thefilerarriage-'shifcing mech:

tween the sawsto be sharpened;

. flhe inner face of the upp er-iront bar of the main frame is providedwith guides'170 for a j'longltudinally-movable bar 171, carrying abelt-shifting loop 172. through whioha driving-helt passes, and thismechanism is oper- .'ated automatlcally to 'alternatelyinove' thedriving-belt betveent'he two pulleys 16; a1id 17', the beltrunning onthe pulley 17 during the filing operation, and'when all of the-teeth of.a saw have-been sharpened the belt isautomatically shiftedto the pulley16 for the to the slidable bar 171. further carries arooker-arm.178,-that is eon-v j neot-ed-t'oabar 18 the latter heinggu'ided by 'antifr'iotion-rollers 181,. carried I a purpose of operatingthe gear 111 and shifizmg the. position ofthe filing carriage;

-'the.con1pletion of thisshifting operation the belt agaiii moved to'the pulley filing operation is again started. r .iAt the left hand end'17, and the projects a rocker-arm 1 76,-that"is connected bracket 182.The free end of the b'ar.180

carries an antifrictionerollerfl$3,that is arranged to be engaged by theouter-cam'132,

I shaft, and't-hroughthe rock-shaft the bar-i 71 as will be seen onreference to F ig. .6 and this cam will move the bar1S0'fro1n'theposition shown in full lines to the positionshown in dottedlines'in Fig. 6,-thus turning the rock-i is. moved to the right, and thebelt 20 is it" will be seen that the roller 150 isinsuc-h position'as topass f th'e'fra'me is a ver tically-dispose'd rook-shaft 175, from.Which This rockshaft carried'from the )ulley 16 to the pulley. startanother fil Cally-disposedshaft 175 also carries a third rocker-arm 186,which is connected to the 011' bar 190. This bar extends rearwardlybracket 191,. while nearv the rear end of the bar is a shoulder 192,that is arranged to en- 'gage against the rear wall fthe bracket forrunning over bracket carries a guided a rod 19 5,conne cted bar at apoint between-the conne'otionof the rocker-M11116?) and thelocking-shoulder 19 2,

and said rod is encircled by a compressionspringv 1916, which when theshoulder is re lug 194, throughwhioh is diately. move the nook-off bartothe opposite position, and this movement Will 4 transmitted throughtherocker-arm 186 to the shaft 175 and from'the latter through thetransferringthe belt to the pulley- 16 forthe purpose of op erating thefiling carriage shift ing me'chanisnu .is engaged by acam 199, thelatter being the cam back to its pro way of the friction-r01 the knockitbar when the latter is moved .thebelt 20" on-pulley 17. [Ateaohcomplete. rotation of the"saw' mandrelthe cam-199 will engage the roller198 and shift theknookoff bar until the shoulder 192 is clear-of theblock 191, whereu' on the spring 196 will move the knock-'ofi barinthemanner prethe beltfrom the pulley-17 to the pulley 16'. Depending fromthe knock-off bar is a sto ation,-a plurality of sawfilingca'rriages maybe em loyed, an additional carriage. 203 be 'riages are connected byaisorew-shaftZ-O i,

that is providedwith a and bytur rg said screw -shaft the carriages 7 toing operation. The ve'rtiinner end of a transversely-disposedknockacross the frame and is'guided' in a blocker.

the purpose of holding the barto'the rear and maintaining thebelt-shifter with the belt thepull'eyg' 17 The block or 5 The extreme.inner endro f the'k nockofi bar'oarries an .antitrict'ion-roller 198,which 95 pivoted to a collar .200, that is fldjllStflblY.

.backto initial position preparatory to holding vio-u sly. describedforthe purpose of shifting arm 202, thatis designed coho-engaged lbyt e;

. In order to increase the rapidity of oper-- 'ing in loated in Figs. 1-and 2;. These oarcrank-handle 205,

to the knock-off I I leased fromthe g ide-hlook' 191 will immer0ekerarm176 to the belt-shifter slide, thus 1 secured to thesaw-mandrel and rotates therewith. Between the-cam and collaris' a'compression-spring 201, that'tends 0 move er positionout of the er onthe rear end of may be properly adjusted with relation to each other andin accordance with the distance between the'saws to be filed, afterwhich they may be firmly clamped together, by a screw passing through aslotted bar 208 on the secondary carriage and entering the threadedopening formed in the main carriage.

In Fig; 9 is shown a modification of the feeding mechanism by which thesaw-mand-rels may be turned. In this case the' main I in'arigid plate213', carried by the frame of the machine,.so that the effective throwof -20 shaft 15 is provided with an eccentric 210, engaging in thebifurcated lower end of a lever 21 1, that is mounted ona pivot-pin 212. The pivot-pin may extend through any one of a series of openingsformed in the lever and through any one of a series of levers formed thelever may be readily adjusted. The upper end of the lever is providedwith a series justable connection with a paw -'rod 215,

of openings and a-suitable pin to ermit ad.-

that is arranged-to eliga ge with the teeth of a disk 216 that iscarried by .the mandrelshaft. In order to prevent accidental feed- I ingmovement during the return of the swinging frame 11, the rock-shaft 135is provided I with an arm? 17 Fig. 9, that is'connected by a link 2'18to'a slidable bar 219', the latter being formed in twosections, whichmay beadjusted and locked in adjustedp'ositionbya screw 220; The {upperend of the'bar is held in engagement with -the teeth of. the

guidedin a bracket 221 and is providedwith an opening for the passage ofa pawl-bar 215.

.It w ll be'seen that when the frame 171 is in feeding-disk 21-6, butwhen the frame is swung outward the arm 217, will b'emoved to*anapproximately vertical position and the bar 219 will. be'elevated,ithus raising the pawl-bar out of, engagement with the teeth of thefeedingedisk j a v "Iclaim 1. In a gin-'sawfili'n'g machine, a frame, a

l V mandrel arranged for thdsupportof aplurality of saws, amovable framecarrying said mandrel, means for rotating the mandrel step by step, acarriage "mounted on the frame, a filing inechanismon the carriage,operating mechanism common to-the mandrel, carriage and saw-filingmechanism, and connections between' the common'operating means and ,themandrel, carriage and saw-a filing mechanism,- timed to automaticallyop- 'erate,at the completion of each rotative movement of the mandrel tomove-the latter out of engagement with the files, to then 'shift-thecarriage to bring'thc files into alinement with the next saw and then.return the mandrel to bring the saws into engagement spring tending toprevent oscillatory movement of the block, and means for depressing theplatform and holding the files in engagement with the teeth of the saw.

3. In mechanism of the class described, the combination With asaw-support, of a pivotally-mounted reciprocatory file-carrymg membersupported thereby, a bracket at one side of the platform, a slotted yokead.-

justably secured to the bracket and provided with parallel horizontalarms disposed-above and below said platform, a guide-rod extendingbetween said arms and passing through the opening in the platform, aspring arranged between the upper arm and the top of the platformplatform.

4, In mechanism of the class described, the combination with a mandrelarranged for the support of a plurality of saws, of a frame, a carriagemovable lengthwise of the frame, a filing mechanism supported by thecarriage, means operable at the end of each com lete rotativelnovementof the mandrel for s ifting the carriage to present the filing mechanisminto alinem'ent with the next saw, a driving member, and means under thecontrol of the revoluble mandrel for alternately connecting said,driving member'to the saw-filing and tending to depress the *mechanismand the carriage-shifting IILBGh- {'anism.

the combination with a mandrel arranged for the support of a pluralityof saws','of a-frame,

a carri -ge'movable lengthwise of the frame,

5. In mechanism of the class described,

IOO

a saw-filing rechanism supported by the carriage, a driving-belt,belt-pulle s, one operatively connected to the saW- ling Irechanism, andthe other to the carriage-shifting mechanism, and means operable at the,end of each complete rotation of the mandrel for shifting theflbeltfrom the filing-niechanismoperati ng pulley'to thecarriage-shift-driving pulley. e I

6. In mechanism of the class described, a mandrel arranged for thesupport of a plurality of saws, a frame, a carriage Irova'ble lengthwiseof the frame, a filing mechanism pair of pu leys, one. connected to thesawfiling rechanism', and the'other to the carriage-shifting mechanism,and a belt-shifter for automatically moving the belt to the pul lay ofthecarriage-shifting.mechanism at the completion of each rotation of themandrel,

supported by the carriage, a driving-belt, a,

mounted on 7 In mechanism of the class described,-

the combination with a mandrel arranged for 'thesupport of a pluralityof saws, .of aframe, a carriage slidablymountedon the frame, a filingmechanism supportedby'the carriage,

a carriage-feed bar,, means carriage and bar direction,

move the bar alone. in

for locking the to move the carriage in one and for disconnecting themto the other direction,

and means for reciprocating said her atthe completion of each rotationof 8. -Inlinechanism of the'class mandrel for the su qsaws,'a frame, a

the mandrel? described, a 1 port. of a'plurality of s 1 filing mechanismsupported by the carriage,

a perforated bar for rock-shaft, an arm in under the control of thearmand serving feeding the. carriage, a

projectingtherefrom, a

'to' lock thecarnage to said bar, and means operating at the ment oftheman drel'for releasing the pin, moving the barfin one'direction, thenallowing the pin to again and finally moving carriagev is lockedthereto;

i tion when the end'of each ro'tative movemove. to locking position thebar in the other direc- 9'. mechanism jof' the class "described,

the combination with a frame, and saw-filing flcarriage, ofa perforatedbracket onsaid car- .r age, a perforated feed-bar, a'spring ressed vpin-arranged "to said bar being ,,ai1 elongated lock thebracket' to t e.bar,

provided at one. end with slet, a rocker-arm extending through theslotand; having .a cam-shape extension at its 5" cam carried thereby anddisposed in the path "ofmovement of upper end, a rock shaft, a

such cam-s aped extension,

' apin-engagmg arm projecting from the rock shaft, and means forac'tuatingsaid rockerarm at predetermined intervals to effect untolocking of the.

, movement of th said carriage.

i 10. lln mechanisni of the class described,

, he'combination 5 ing mechanism carriage and reciprocatory' eperforatedbar to advance w1th a file-carriage, of a feedtherefor comprlsing a lon1-- j tndinally-movable'bar, means for locking t e' carriage thereto, anelon ated'slot, ing the look over said bar having at one end a block,means for 'adjustone end of the slot to alter 5 "the elfective lengththereon, a rocker arm operating in v the slotto effect reciprocatory'.movement :ofthe bar, a rock-shaft, means at.

one end of. the rock-shaft for'rel'easing the carriage' from the bar,anda cam disposed at the opposite end oft-he shaft and actuated by' 1said r0 cker-arm.

1. Inme'chamsm of the ass" described,

- a saw mandrel,

ing therefrom. an

a frame, a carriage s'lidably the frame, a canriage-feedlng' 0 mechanismincluding a-freciprocatory bar, Y means for lockirn and releasing thecarriage and bar,-a'rock.-s haf t, a rocker-arm project- Q I thecombination 1 engaging sald bar', a second able carriage thereon, "a.

'in'ion, a gear-wheel with which said ,connecte' thereby into rocker-armprojecting from the shaft, a lever connected to said second rocker-arm,an a rev'oluble cam for. engaging the ro cker-arm and transmittingmovement to the rock-shaft.

- 12.:In mechanism of the class described,-

the combination with a frame, of a carriage mounted thereon, means formoving the carriage lengthwise ofthe frame, a saw-filing mechanism onthe carriage, a pivoted frame, a saw-supportin mandrel on frame,a'drivingelt, a pair of pulleys w1th which said belt may be connected,one .of the pulleys being connected to mechanism, a'pinion, a clutchforconnecting .the pivoted awin the pinion to the second pulley to drivethe lntermeshes, a series of cams carried ythe gear-wheel and leversystems in the paths of."

the cams arranged to transmit the carriage, the pivoted frame, effectand to movemen to the shifting of the belt from the pinion-.drivingpulley and the-pulley of the fillng mech'anism;

' 13. In mechanisr'nof the combination with a frame,

riage, a saw-filing mechanism on said carriage, a' pivoted frame, a sa3y-support1ngmandrel on said ivotedframe, a p driving 'elt, a pair ofp.lleys with -wh1ch the belt may engage, one of said pulleys being d to,the saw-filing mechanism, .a

the class described, I of a carriage mounted thereon, meansfor movingthe care. I

belt-shifting bar, a

pinion,a clutch for connecting the pinion to thesecondpulIeyItO drivethe pinion, a gearwheel' with .whic said pinion 1ntermeshes,'a pluralityof cams carried by the gear-wheel and lever systems in the paths of thecams arrangedlto transmit movement to the pivoted frame, the ca rria eand the belt-shifter bar,

' and a stop carried y said the path of the gear-wheel to arrest themovementof the latter.

bar and movable ,is connected to the saw-filing mechanism, a connectingthe same to pinion, a, clutch for the second pulley to drive the pinion,a gear with which said pinion intermeshes, a plu the gear and loverrality of cams carried by systems in the paths of the cams arranged to oerate the pivoted frame, the carriage and t e shifter-bar, and ayieldably-mounted cam carried by the saw-mandrel and serving to movethe-shifter-bar to release position.

15. Iii-mechanism of the class 'de'scribed,

from'its locked'position,-

5 with asaw-support, of a

